US5348202A - Tubular refractory product - Google Patents
Tubular refractory product Download PDFInfo
- Publication number
- US5348202A US5348202A US08/037,997 US3799793A US5348202A US 5348202 A US5348202 A US 5348202A US 3799793 A US3799793 A US 3799793A US 5348202 A US5348202 A US 5348202A
- Authority
- US
- United States
- Prior art keywords
- component
- refractory
- composition
- body portion
- pouring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/28—Plates therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
Definitions
- This invention relates to a refractory product for use in continuous casting. More particularly, the invention is concerned with tubular refractory products for use in pouring of melt from the tundish to the mould.
- Flow of melt from the tundish into a mould is commonly controlled by raising or lowering of a refractory stopper rod from or to a seating position in the base of the tundish where there is located either a fixed sub-entry nozzle (SEN) or a tundish nozzle, built into the tundish base, onto which a sub-entry shroud (SES) is fastened.
- SEN sub-entry nozzle
- SES sub-entry shroud
- the present systems use an upper nozzle having a seating position to receive a flow control stopper located within a well block fixed into the tundish lining against which a stationary plate is fitted and incorporating a suitable jointing arrangement between the two components.
- a lower assembly is held in place against the underside of this stationary plate by the tube changer mechanism and comprises a moving plate and submerged pouring shroud jointed by a suitable arrangement and retained within a strengthening steel shell which serves to hold the two components firmly together and to withstand the pressures transmitted by the operating piston.
- An object of the present invention is to obviate or mitigate the aforementioned problems by providing improved pouring tubes suitable for use in conjunction with bottom pouring metallurgical vessels and existing tube changers, thereby obviating the need for further development of the changer mechanisms.
- the present invention provides a refractory pouring assembly component suitable for use with a tube-changing mechanism to provide a replaceable pouring means comprising an elongate tubular body having a throughbore for pouring of molten metal during continuous casting from a tundish into a mould wherein the refractory pouring component is isostatically pressed from different refractory compositions that impart selected thermal shock and wear-resisting properties into a one-piece composite body which is shaped to provide at one end a smooth, flat plate surface in which there is defined an aperture, at least the peripheral edge around said aperture being formed of a hard refractory material to provide an edge which, during a tube-changing operation, is capable of cutting a skin or shell of solidified melt formed within the throughbore of the pouring assembly during pouring of molten metal therethrough, whilst the remainder of said body is formed to a tubular shape from a thermal shock-resistant material to provide for pouring of melt.
- the end of the one-piece member that defines the flat plate surface is made from a refractory which is harder and more wear-resistant than the main part of the tubular body, while the main part of the tubular body is made from another refractory composition which is softer and has greater thermal shock resistance than the fiat plate surface.
- the harder, wear-resistant refractory may be an alumina, silica, zirconia, carbon composition.
- the components of this material are usually such that the alumina exceeds about 45% by weight, while the silica and zirconia are present in lesser amounts such that the zirconia may exceed the quantity of silica and still allow a small quantity of carbon to be included.
- a desirable composition comprises 53% alumina, 18% silica, 24% zirconia and 3% carbon with the balance being minor amounts of typical materials used in this art.
- the softer refractory material which makes up the main part of the tubular body and provides the desired thermal shock resistance may consist principally of an alumina, silica, carbon composition.
- the refractories making up the one-piece composite member of the invention can be bonded in a suitable manner, such as by resin which forms a carbonaceous bond after firing.
- the component can be bonded by silicon nitride or oxy-nitride materials selected from the group consisting of alumina/graphite, zirconia/graphite, magnesia/graphite, and mixtures thereof.
- the invention approaches the problem of imperfect seals with a new solution in that totally new refractory components are used in the pouring assembly.
- Each of the previously sliding upper and lower plates of the tube changer system, the tundish bottom nozzle or block, and the pouring tube is now replaced.
- two components are provided by this invention, thereby eliminating two of the troublesome joints in the pouring/changer assembly.
- the plates of the tube changer have to be sufficiently hard as to be able to sever cleanly the frozen melt skin or shell formed during pouring of melt through the assembly whilst the pouring tube leading from the changer plates into the mould must be capable of withstanding thermal shocks.
- These requirements are generally considered to be opposing in that a material having suitable hardness characteristics is of generally poor resistance to thermal shock and vice versa.
- a refractory component having the requisite hardness and thermal shock-resistant properties using the above-mentioned materials or the like.
- the invention may be applied to the upper tube changer fixed plate/tundish block or nozzle parts of the pouring assembly or to the lower sliding plate/pouring tube parts of the pouring assembly. Best advantages are obtained with replacement of all known components with the new composite components of this invention.
- FIG. 1 is a section through a conventional lower slide plate of a tube changer
- FIG. 2 is a section through a conventional pouring tube adapted to mate with the lower slide plate shown in FIG. 1;
- FIG. 3 is a section through a pouring tube of this invention which replaces the components shown in FIGS. 1 and 2;
- FIG. 4 is a section through a pouring nozzle with an integral upper changer plate for fixing in the bottom of a tundish to form the upper part of a pouring assembly provided in accordance with this invention
- FIG. 5 is a section through a pouring component (SES) with an integral lower slide changer plate for presentation to a corresponding upper plate in an upper part of a pouring assembly provided in accordance with this invention.
- SES pouring component
- FIG. 6 is a section through another embodiment of a pouring component (SES) similar in function to that of FIG. 5.
- SES pouring component
- a refractory pouring body 1 having a throughbore 2, for use with a tube-changing mechanism to provide a replaceable means for pouring of molten metal during continuous casting from a tundish into a casting mould is isostatically pressed from powder refractory materials and binders selected to impart thermal shock and wear-resisting properties to the refractory one-piece composite body 1 which is formed by the isostatic pressing.
- the pressing operation to mould the refractory powder material is carried out in a manner generally known per se using a flexible mould to provide a shaped refractory body 1 having at one end of the body a flat plate surface 3 whilst the remainder of the body 1 is of generally cylindrical shape.
- Arbors and sacrificial void formers are inserted in the mould which is packed with the powder refractory/binder materials in order to provide in the pressed composite an axial throughbore 2 extending from an aperture 4 in the plate 3 to divergent outlets 5 at the tip 6 of the pouring body 1.
- a wear-resistant plate 3 and a peripheral edge 3' around said aperture 4 which, during a tube-changing operation, is capable of cutting a skin or shell of solidified melt formed within the throughbore of the pouring assembly during pouring of the molten metal therethrough, while ensuring that the main tubular part of the body 1 has the desired thermal shock resistance.
- a band 7 of wear-resistant refractor material such as zirconia or high zirconia/graphite mix is provided in a manner known per se.
- a protective metal can 8 is fitted after normal finishing of the refractory composite. These finishing steps may include fine grinding of the plate surface 3.
- the composite refractory in much the same way as for the known two-part assembly, using the underside of the metal can 8 to receive thrust to locate the support, the composite pouring tube for use beneath either the conventional two-part upper changer plate and tundish nozzle or the new composite of this invention as will be described herein below.
- a refractory pouring nozzle 21 for location in the well block 20 in the bottom of a tundish 19 has a throughbore 22 and an integrally formed plate surface 23 for use with a tube-changing mechanism during continuous casting from a tundish into a casting mould is isostatically pressed from powder refractory materials and binders selected (as discussed hereinbefore) to impart thermal shock and wear-resisting properties to the refractory one-piece composite body 21.
- the pressing operation to mould the refractory powder material is carried out in a manner generally known per se using a flexible mould to provide a shaped refractory body 21 having at one end of the body a flat plate surface 23 whilst the remainder of the body 21 is optionally of tapered or cylindrical shape. Arbors and sacrificial void formers (if necessary) are inserted in the mould which is packed with the powder refractory/binder materials in order to provide in the pressed composite an axial throughbore 22 extending from an aperture 24 in the plate 23 to inlet 25 having a shape adapted to provide a seating surface 26 for a stopper (not shown).
- refractory materials as described in Tables I and II, bonded with suitable binders and with appropriate filling and packing of the mould, it is possible to provide a plate surface 23 having the desired wear resistance and a hard peripheral edge 23' around said aperture 24 which, during a tube-changing operation, is capable of cutting a skin or shell of solidified melt formed within the throughbore of the pouring assembly during pouring of molten metal therethrough, whilst the main part of the body 21 may be optionally formed of a thermal shock-resistent material. Normal finishing of the refractory which may include fine grinding of the plate surface 23 is carried out.
- FIG. 5 of the drawings A further embodiment of the invention is shown in FIG. 5 of the drawings.
- a submerged entry shroud SES
- SES submerged entry shroud
- it is formed in a manner generally equivalent to that described in Example 1 to provide a refractory pouring body 31 with a throughbore 32 and at one end of the body 31 a flat plate surface 33, whilst the remainder of the body 31 is of generally cylindrical shape for use with a tube-changing mechanism as described before.
- a plate surface 33 which is wear-resistant and a hard peripheral edge 33' around said aperture 34 which, during a tube-changing operation, is capable of cutting a skin or shell of solidified melt formed within the through-bore of the pouring assembly during pouring of molten metal therethrough, while the main part of the tubular body 31 is formed of a thermal shock-resistant material. Since the embodiment under discussion is intended for use as a submerged entry shroud, a band 37 of wear-resistant refractory material such as zirconia or high zirconia/graphite mix is provided in a manner known per se.
- a protective metal can 38 is fitted, and normal finishing of the refractory composite which may additionally include fine grinding of the plate surface 33, is carried out.
- an exemplary composite includes 53% alumina, 18% silica, 24% zirconia and 3% carbon (as graphite) with the balance being minor amounts of typical materials used in this art.
- this embodiment is similar to that of Example 3 and parts thereof are numbered in an analogous fashion. Since the unit is manufactured in a single copressing step, there is no risk of steel penetration at the interface.
- the advantages of this invention are that the proposed pouring assembly by using upper and lower components of isostatically pressed graphitised alumina/silica or graphitised alumina/silica zirconia mix or the like, heat resisting, wear-resisting ceramic materials produces a high integrity rigid system which completely eliminates two the previous high risk joints, thereby reducing the disadvantages of gas leakage. This leads to less build-up of alumina and choking of the pouring tubes.
- Another advantage lies in the improved control of the movable system arising from the rigidity of the new system. Additionally, by supplying a composite pouring body, there is a reduction of on-site assembly work which makes for improved quality control.
- the first two columns list various properties of prior art slide gate (SG) plates and sub-entry shrouds (SES), while the remaining columns list the properties of the preferred materials employed in carrying out the present invention.
- the columns under heading (b) indicate the properties of the plate which is part (3) in FIG. 3, part (23) in FIG. 4, part (33) in FIGS. 5, as well as the annulus (4Y) in FIG. 6, and the properties of the shroud which is the tubular body portion of part (1) in FIG. 3, part (21) in FIG. 4, part (31) in FIG. 5 and part (41) in FIG. 6.
- the columns under heading (a) show the properties of refractory material which can be used as a blend between the plate and shroud materials.
- Table II lists the preferred and exemplary compositions for the plate in the embodiments of FIGS. 3-5, as well as the annulus in the embodiment of FIG. 6, and for the shroud or main tubular body portion in all embodiments.
Abstract
Description
TABLE I __________________________________________________________________________ PREFERRED MATERIAL PROPERTIES COMMON COMPATIBLE BODY CO-PROCESS PHASES SG (a) plate (b) shroud Property Plate SES range typical range typical range typical __________________________________________________________________________ Bulk Density g/cc 3.05-3.15 2.15-2.40 2.55-2.68 2.62 2.77-2.91 2.86 2.25-2.45 2.38 App. Porosity % 5-20 14-20 13-15.6 14.3 14-17.2 15.7 15-19 17.0 Cold Crushing 137-157 20.6-28.5 47-60 54.4 150-170 162 16.2-21.5 18.8 Strength MN/m.sup.2 Modulus of Rup- 45.7-52.3 6.0-9.5 16-20.5 18.4 49-57 54 5.5-7.5 6.3 ture MN/m.sup.2 Hot Modulus 12.7-15.7 6.0-8.8 14-18 N/A 12.5-15 14 5.3-7.3 6.2 1500° C. MN/m.sup.2 Thermal Expan. 0.9-1.3 0.2-0.4 0.5-0.7 0.6 0.6-0.85 0.8 0.3-0.5 0.4 1500° C. % __________________________________________________________________________
TABLE II ______________________________________ Compatible Co-Pressed Phases plate plate shroud shroud Material range % typical % range % typical % ______________________________________ Al.sub.2 O.sub.3 51-55 53 50-54 52 SiO.sub.2 16.5-18.5 18 13-16 15 ZrO.sub.2 23.5-27 24 0 0 C 2-4 3 28-32 31 Matrix Bond 1.5-2.5 2 1-4 2 ______________________________________
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/037,997 US5348202A (en) | 1987-02-28 | 1993-03-25 | Tubular refractory product |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8704764 | 1987-02-28 | ||
GB878704764A GB8704764D0 (en) | 1987-02-28 | 1987-02-28 | Tubular refractory product |
US39945389A | 1989-10-27 | 1989-10-27 | |
US07/667,985 US5198126A (en) | 1987-02-28 | 1991-03-12 | Tubular refractory product |
US08/037,997 US5348202A (en) | 1987-02-28 | 1993-03-25 | Tubular refractory product |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US39945389A Continuation-In-Part | 1987-02-28 | 1989-10-27 | |
US08667985 Continuation | 1993-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5348202A true US5348202A (en) | 1994-09-20 |
Family
ID=27263331
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/667,985 Expired - Lifetime US5198126A (en) | 1987-02-28 | 1991-03-12 | Tubular refractory product |
US08/037,997 Expired - Lifetime US5348202A (en) | 1987-02-28 | 1993-03-25 | Tubular refractory product |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/667,985 Expired - Lifetime US5198126A (en) | 1987-02-28 | 1991-03-12 | Tubular refractory product |
Country Status (1)
Country | Link |
---|---|
US (2) | US5198126A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5681499A (en) * | 1994-06-15 | 1997-10-28 | Vesuvius Crucible Company | Method and compositions for making refractory shapes having dense, carbon free surfaces and shapes made therefrom |
WO1998042465A1 (en) * | 1997-03-24 | 1998-10-01 | North American Refractories Company | Refractory pour tube with cast plate |
US5849245A (en) * | 1996-05-28 | 1998-12-15 | Tokyo Yogyo Kabushiki Kaisha | Well brick of vessel for molten metal |
US5885520A (en) * | 1995-05-02 | 1999-03-23 | Baker Refractories | Apparatus for discharging molten metal in a casting device and method of use |
US5954989A (en) * | 1997-03-20 | 1999-09-21 | Vesuvius Crucible Company | Erosion and abrasion resistant refractory composition and article made therefrom |
US5979719A (en) * | 1998-04-17 | 1999-11-09 | Vesuvius Crucible Company | Soft-bore monoblock pouring tube |
WO2001002114A1 (en) * | 1999-07-01 | 2001-01-11 | Vesuvius Crucible Company | Soft-bore monoblock pouring tube |
US6479175B1 (en) * | 1998-05-05 | 2002-11-12 | Didier-Werke Ag | Ceramic composite |
WO2003041894A2 (en) * | 2001-11-13 | 2003-05-22 | Vesuvius Crucible Company | Multi-hole, multi-edge control plate for linear sliding gate |
WO2012148560A1 (en) * | 2011-04-29 | 2012-11-01 | Vesuvius Crucible Company | Refractory element, assembly and tundish for transferring molten metal |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0646430B1 (en) * | 1992-06-18 | 2000-08-02 | Shinagawa Refractories Co., Ltd. | Refractory block for continuous casting |
JPH07108439B2 (en) * | 1992-09-18 | 1995-11-22 | 明智セラミックス株式会社 | Nozzle for continuous casting |
JPH06134557A (en) * | 1992-10-23 | 1994-05-17 | Tokyo Yogyo Co Ltd | Sliding nozzle for molten metal incorporating vessel |
US5370370A (en) * | 1993-02-19 | 1994-12-06 | Vesuvius Crucible Company | Liner for submerged entry nozzle |
US5785880A (en) * | 1994-03-31 | 1998-07-28 | Vesuvius Usa | Submerged entry nozzle |
US5944261A (en) * | 1994-04-25 | 1999-08-31 | Vesuvius Crucible Company | Casting nozzle with multi-stage flow division |
IN191421B (en) * | 1994-06-15 | 2003-11-29 | Vesuvius Frnance Sa | |
TW362053B (en) * | 1996-07-09 | 1999-06-21 | Baker Refractories | Nozzle co-molded with slagline sleeve, method for marking the same, and slagline sleeve composition |
UA51734C2 (en) * | 1996-10-03 | 2002-12-16 | Візувіус Крусібл Компані | Immersed cup for liquid metal passing and method for letting liquid metal to path through it |
JP3506655B2 (en) * | 2000-04-28 | 2004-03-15 | 明智セラミックス株式会社 | Continuous casting nozzle |
US6932250B2 (en) * | 2003-02-14 | 2005-08-23 | Isg Technologies Inc. | Submerged entry nozzle and method for maintaining a quiet casting mold |
ATE510641T1 (en) * | 2009-07-01 | 2011-06-15 | Refractory Intellectual Prop | POURING NOZZLE |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4108675A (en) * | 1975-01-29 | 1978-08-22 | Nippon Kokan Kabushiki Kaisha | Brick for sliding closure of vessel for holding molten metal |
DE2816283A1 (en) * | 1977-04-15 | 1978-10-26 | Uss Eng & Consult | Slide valve fireproof valve plate - has perforated plate with fireproof coating applied by thermal spraying |
US4179046A (en) * | 1977-04-29 | 1979-12-18 | Didier-Werke A.G. | Refractory plate for slide closures of metallurgical vessels |
JPS5614060A (en) * | 1979-07-12 | 1981-02-10 | Kurosaki Refract Co Ltd | High durability nozzle for casting |
EP0080672A2 (en) * | 1981-11-26 | 1983-06-08 | Uss Engineers And Consultants, Inc. | Improvements in sliding gate valves |
EP0171487A1 (en) * | 1984-08-14 | 1986-02-19 | Hepworth Refractories (Belgium) S.A. | Device for the external closing of a vessel for molten metal |
EP0198123A1 (en) * | 1985-04-11 | 1986-10-22 | Société Belge des Produits Réfractaires en abrégé "B.E.L.R.E.F." | Method of sealing junction canals for liquid metal and canals sealed by using this method |
EP0198237A1 (en) * | 1985-03-20 | 1986-10-22 | Gr-Stein Refractories Limited | Refractory component |
JPS62158562A (en) * | 1986-01-06 | 1987-07-14 | Harima Refract Co Ltd | Nozzle for low-temperature casting of molten steel |
US4738380A (en) * | 1986-02-28 | 1988-04-19 | Flo-Con Systems, Inc. | Self-adjusting refractory joint |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1157818A (en) * | 1965-09-23 | 1969-07-09 | United States Steel Corp | Nozzle Extension for Continuous Casting |
-
1991
- 1991-03-12 US US07/667,985 patent/US5198126A/en not_active Expired - Lifetime
-
1993
- 1993-03-25 US US08/037,997 patent/US5348202A/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4108675A (en) * | 1975-01-29 | 1978-08-22 | Nippon Kokan Kabushiki Kaisha | Brick for sliding closure of vessel for holding molten metal |
DE2816283A1 (en) * | 1977-04-15 | 1978-10-26 | Uss Eng & Consult | Slide valve fireproof valve plate - has perforated plate with fireproof coating applied by thermal spraying |
US4179046A (en) * | 1977-04-29 | 1979-12-18 | Didier-Werke A.G. | Refractory plate for slide closures of metallurgical vessels |
JPS5614060A (en) * | 1979-07-12 | 1981-02-10 | Kurosaki Refract Co Ltd | High durability nozzle for casting |
EP0080672A2 (en) * | 1981-11-26 | 1983-06-08 | Uss Engineers And Consultants, Inc. | Improvements in sliding gate valves |
EP0171487A1 (en) * | 1984-08-14 | 1986-02-19 | Hepworth Refractories (Belgium) S.A. | Device for the external closing of a vessel for molten metal |
EP0198237A1 (en) * | 1985-03-20 | 1986-10-22 | Gr-Stein Refractories Limited | Refractory component |
EP0198123A1 (en) * | 1985-04-11 | 1986-10-22 | Société Belge des Produits Réfractaires en abrégé "B.E.L.R.E.F." | Method of sealing junction canals for liquid metal and canals sealed by using this method |
JPS62158562A (en) * | 1986-01-06 | 1987-07-14 | Harima Refract Co Ltd | Nozzle for low-temperature casting of molten steel |
US4738380A (en) * | 1986-02-28 | 1988-04-19 | Flo-Con Systems, Inc. | Self-adjusting refractory joint |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5681499A (en) * | 1994-06-15 | 1997-10-28 | Vesuvius Crucible Company | Method and compositions for making refractory shapes having dense, carbon free surfaces and shapes made therefrom |
US5885520A (en) * | 1995-05-02 | 1999-03-23 | Baker Refractories | Apparatus for discharging molten metal in a casting device and method of use |
US5849245A (en) * | 1996-05-28 | 1998-12-15 | Tokyo Yogyo Kabushiki Kaisha | Well brick of vessel for molten metal |
US5954989A (en) * | 1997-03-20 | 1999-09-21 | Vesuvius Crucible Company | Erosion and abrasion resistant refractory composition and article made therefrom |
CN1072536C (en) * | 1997-03-24 | 2001-10-10 | 北美耐火材料公司 | Refractory pour tube with cast plate |
US5866022A (en) * | 1997-03-24 | 1999-02-02 | North American Refractories Company | Refractory pour tube with cast plate |
WO1998042465A1 (en) * | 1997-03-24 | 1998-10-01 | North American Refractories Company | Refractory pour tube with cast plate |
US5979719A (en) * | 1998-04-17 | 1999-11-09 | Vesuvius Crucible Company | Soft-bore monoblock pouring tube |
US6479175B1 (en) * | 1998-05-05 | 2002-11-12 | Didier-Werke Ag | Ceramic composite |
WO2001002114A1 (en) * | 1999-07-01 | 2001-01-11 | Vesuvius Crucible Company | Soft-bore monoblock pouring tube |
WO2003041894A2 (en) * | 2001-11-13 | 2003-05-22 | Vesuvius Crucible Company | Multi-hole, multi-edge control plate for linear sliding gate |
WO2003041894A3 (en) * | 2001-11-13 | 2004-05-13 | Vesuvius Crucible Co | Multi-hole, multi-edge control plate for linear sliding gate |
US20040239016A1 (en) * | 2001-11-13 | 2004-12-02 | King Patrick Dana | Multi-hole, multi-edge control phate for linear sliding gate |
AU2002350171B2 (en) * | 2001-11-13 | 2007-02-15 | Vesuvius Crucible Company | Multi-hole, multi-edge control plate for linear sliding gate |
WO2012148560A1 (en) * | 2011-04-29 | 2012-11-01 | Vesuvius Crucible Company | Refractory element, assembly and tundish for transferring molten metal |
CN103582535A (en) * | 2011-04-29 | 2014-02-12 | 维苏威坩埚公司 | Refractory element, assembly and tundish for transferring molten metal |
Also Published As
Publication number | Publication date |
---|---|
US5198126A (en) | 1993-03-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5348202A (en) | Tubular refractory product | |
US5185300A (en) | Erosion, thermal shock and oxidation resistant refractory compositions | |
EP0346378B1 (en) | Tubular refractory product | |
CA1043073A (en) | Pouring of molten metals | |
US5954989A (en) | Erosion and abrasion resistant refractory composition and article made therefrom | |
US5403794A (en) | Alumina-zirconia refractory material and articles made therefrom | |
US5335833A (en) | Zirconia graphite slide gate plates | |
US5151201A (en) | Prevention of erosion and alumina build-up in casting elements | |
AU694545B2 (en) | Flow control device | |
EP0282247B1 (en) | Refractory assemblies | |
AU667089B2 (en) | Vibratable refractory composition | |
EP0969942A1 (en) | Refractory pour tube with cast plate | |
CA1168019A (en) | Immersion nozzle for continuous casting of molten steel | |
GB2095612A (en) | Improve monoblock one-piece pouring stopper | |
AU2002309507B2 (en) | Refactory article having a resin-bonded liner | |
GB2247637A (en) | Stoppers for use in molten metal handling | |
US4917276A (en) | Sliding gate nozzle for special steel | |
EP1133373B1 (en) | Improvements in or relating to refractory products | |
US5979719A (en) | Soft-bore monoblock pouring tube | |
GB2220875A (en) | Integral slide-valve member and casting tube member | |
US5656192A (en) | Immersed metallurgical pouring nozzles | |
GB2056430A (en) | Immersion Nozzle for Continuous Casting of Molten Steel | |
WO2001002114A1 (en) | Soft-bore monoblock pouring tube | |
GB2344304A (en) | A refractory device with a pyroplastic interface zone which deforms at high temperatures | |
GB2211449A (en) | Outlet valve for melt-vessel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: APPLICATION UNDERGOING PREEXAM PROCESSING |
|
AS | Assignment |
Owner name: THOR CERAMICS LIMITED, SCOTLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, STEPHEN JOHN;REEL/FRAME:006612/0114 Effective date: 19930505 |
|
AS | Assignment |
Owner name: COMERICA BANK, MICHIGAN Free format text: SECURITY AGREEMENT;ASSIGNOR:NORTH AMERICAN REFRACTORIES COMAPNY;REEL/FRAME:008126/0633 Effective date: 19951204 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: RHI REFRACTORIES UK LIMITED, SCOTLAND Free format text: CHANGE OF NAME;ASSIGNOR:THOR CERAMICS LIMITED;REEL/FRAME:013333/0573 Effective date: 20011105 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG, AU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RHI REFRACTORIES UK LIMITED;REEL/FRAME:018323/0951 Effective date: 20060822 |